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Easy exponent precalc problem. 4^(1+√2) * 4^(1-√2)

  1. Oct 28, 2011 #1
    Can anyone do the steps to: 4^(1+√2) * 4^(1-√2)?
    The book says it's 16, but I got 16^-1
    steps:
    foil exponents: that comes out to 1-2 ? Should it not be ?
    then, just multiply the 4's, or do you add them?
     
  2. jcsd
  3. Oct 28, 2011 #2

    gb7nash

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    This is your problem. What should you be doing to the exponents?
     
  4. Oct 28, 2011 #3
    can you rephrase that, what do you mean by that?
     
  5. Oct 28, 2011 #4

    gb7nash

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    You're trying to foil the exponents. That indicates that you're multiplying them. What should you be doing instead to the exponents?
     
  6. Oct 28, 2011 #5
    Got it thanks
     
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